/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package controller;

import dao.TaiKhoanDAO;
import dao.ThongTinTaiKhoanDAO;
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import util.MailUtil;

/**
 *
 * @author Ngoc Linh
 */
@WebServlet(name = "help", urlPatterns = {"/help.do"})
public class help extends HttpServlet {

    /** 
     * Processes requests for both HTTP <code>GET</code> and <code>POST</code> methods.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        response.setContentType("text/html;charset=UTF-8");
        PrintWriter out = response.getWriter();
        try {

            if (request.getCharacterEncoding() == null) {
                request.setCharacterEncoding("UTF-8");
            }
            if (response.getCharacterEncoding() == null) {
                response.setCharacterEncoding("UTF-8");
            }

            HttpSession session = request.getSession();
            if (session.getAttribute("taiKhoan") != null) {
                response.sendRedirect("index.do");
                return;
            }

            if (request.getParameter("user_remind") != null) {
                String userRemind = request.getParameter("user_remind");
                String email = ThongTinTaiKhoanDAO.LayEmailNguoiDung(userRemind);
                if (email == null) {
                    request.setAttribute("message", "Không tìm thấy email của tài khoản có tên đăng nhập bạn cung cấp !");
                } else {
                    //Gởi mail:
                    String body = TaiKhoanDAO.LayNoiDungMailResetMatKhau(userRemind);
                    MailUtil mail = new MailUtil(email, "P2T Bid - Nhắc mật khẩu", body);
                    if (mail.send()) {
                        request.setAttribute("message", "Một email chứa thông tin đăng nhập đã được gởi đến địa chỉ email bạn đã đăng ký ! Vui lòng kiểm tra kĩ trong hộp thư của bạn.");
                    } else {
                        request.setAttribute("message", "Lỗi từ hệ thống, mail không thể được gởi đi. Vui lòng thử lại !");
                    }
                }
            }

            String url = "help.jsp";
            RequestDispatcher rd = request.getRequestDispatcher(url);
            rd.forward(request, response);
        } catch (Exception ex) {
            response.sendRedirect("errorpage.do");
        } finally {
            out.close();
        }
    }

    // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
    /** 
     * Handles the HTTP <code>GET</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /** 
     * Handles the HTTP <code>POST</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /** 
     * Returns a short description of the servlet.
     * @return a String containing servlet description
     */
    @Override
    public String getServletInfo() {
        return "Short description";
    }// </editor-fold>
}
